Fixes#30235
If the key id "front" byte has a single digit, `%X` is missing the 0
prefix.
` 38D1A3EADDBEA9C` instead of
`038D1A3EADDBEA9C`
When using the `IssuerFingerprint` slice `%X` is enough but I changed it
to `%016X` too to be consistent.
(cherry picked from commit eb505b128c7b9b2459f2a5d20b5740017125178b)
Conflicts:
- models/asymkey/gpg_key_commit_verification.go
Ported the change to models/asymkey/gpg_key_object_verification.go
